Swinging grinder.



M. E'. APGAR.

SWINGING GRINDER.

APPLIOATION FILED 111,111.6, 1909.

Patented Apr. 19, 1910.

2 SHEETS-SHEET l.

M. F. APGAR.

SWINGING GRINDER.

APPLICATION FILED MAR. e, 1909.

Patented Apr. 19, 1910.

2 SHEETS-SHEET 2.

Mli/Mmmm and the motor UNTTED sTATiis PATENT onirica.

MARSHALL F. APGAR, OF HIGH BRIDGE, NEW JERSEY, ASSIGNOR TO TAYLOR IRON@t n STEEL COMPANY, OF HIGH BRIDGE, NEW JERSEY, A CORPORATION OF NEWJERSEY.

SWING-ING GRINDER.

Specification of Letters Patent.

Patented Apr.' 19, 1910.

Appiication med March c, 1909. seiai No. 481,778.

which will enable the grinding wheell thereofI to be swung into anydesired position relative' to the work by the operator, whereby it isuniversally adjustable, and in which also the grinding wheel will be socounterbalanced, either by the driving means therefor or otherwise, thatthe weight of such grinding wheel will not interfere with themanipulation thereof into any position to which it may be founddesirable to quickly swing it.

In the drawings accompanying and forming part of this specification,Figure 1 is a side elevation of this improved swinging grinder, with theperpendicular supporting means partly broken away, and showing in dottedlines one means of counterbalancing the grinder; Fig.v 2 is a top viewthereof, with the supporting means shown in section; Fig. 3 is anenlarged partly sectional View of the grinding wheel end of the grinder;Fig. 4 is a detail plan view of the supporting means for the motor; Fig.5 is a side view of the parts shown in Fig. 4; Fig. 6 is a detailsectional view of the connection between the perpendicular supportingmeans platform supporting means; Fig. 7 is a view of the yoke lookingfrom left to right in Fig. 6; and Fig. 8 is a view of the overhangingyoke for the depending spindle.

Similar characters of reference indicate corresponding parts throughoutthel differ- V ent figures of the drawings.

In the embodiment shown this improved swinginggriiider comprises, in ageneral Way, a grinding mechanism 2 and a driving mechanism 3 supportedrelatively` remote one fiom `the other and in such positions withrelation 'to each other and 'to their 4 Support that the niotor may beused if deanism, these two mechanisms being carried by a supportingmeans 4 adapted to be connected to an overhanging support or ceiling,the several parts being so organized that the grinding wheel may have aswinging movement in a vertical plane with the motor, a swingingmovement in a'horizontal -plane with the motor, a back-and-forthmovement with the motor, and a movement in a circular directionindependent of the motor.

In the preferred form shown," the supporting means 4 for the grinderland motor mechanism may comprise a yoke 5 pivotally attached by means ofa pivot rod or pivot G with a hanger 7 adapted for attachment to aceiling 8 or other overhanging support. By this pivotal connectionbetween the yoke and hanger the yoke and the mechanism carried therebywill have a V.swinging movement relatively to its overliaiiging support.Swiveled iii this yoke is a depending spindle 9 having suitable means,as a collar, for securing it to the yoke. On the lower end of thisspindle is loosely mounted a sleeve 10 to projections at the sides ofwhich is bolted a yoke 11 `carrying a pivot rod or spindle 12 forsupporting the grinding and motor mechanisms. The sleeve 10 ismaintained in position by a pair of collars 13 and 14, both secured tothe spindle 9, the sleeve 10 having a' ange encircling the collar 13while the collar 14 has a flange encircling the sleeve 10. By thisconstruction the spindle 9 can have a rotary or swivel movementrelatively to the sleeve 10. Between the collar 13 and the sleeve, and

within the flange thereof, may be located a f suitable packing'l. Thecollar '14 is provided with oil inlets 16. By this construction themechanisms supported by the spind-le can have a swinging movement in ahorizontal plane.

The supporting means for the grinding and motor mechanisms comprises abracket 17 mounted on the pivot 12 of the yoke 11 for swinging movementrelatively thereto. This bracket comprises a depending portion 19 havingarearwardly extending platform -20 on which the motor is bolted. Thebracket also has a forwardly extending tubular portion 21 for thereception of the supporting arm 22 of the grinding wheel. Thissupporting arm or rod 22 is preferably b ent at its outer end so as tobring the driving wheel 23 of the motor into alinement with the drivenwheel 24 of the grinding wheel, these two wheels being connected by asuitable belt 25. The outer end of this' arm 22, whichmay be in the formof a tube if preferred, has loosely mounted thereon a sleeve 26, beingsecured against endwise play by means or a pair of collars 27 and 28fastened to the supporting arm 22 with suitable means, as at 29, forinsuring a properly lubricated joint. By this means it will be observedthatfthe sleeve is rotatable upon the supporting arm 22. Projecting fromeach side of the sleeve is a pair of arms 30 forming with such sleeve ayoke for supporting the grinding wheel of the grinding mechanism. Eachof these arms-30 terminates at its free end in a bearing member 31, theother half or cap 32 of each of which is carried, by arms 33 secured toa suitable handle or cross bar 34.l By this means it will be .seen thatthe handle and its arm may be readily detached and thus permit thegrinding wheel 36 to be detached` from its supporting arm. j

Secured to the yoke sleeve 26 is a bracket 37 for supporting ashield 38over the upper portion of the grinding wheel, thereby to protect theoperator.

In the improved swinging grinder shown, the operator, on grasping thehandles, can swing the grinder backward and forward in substantially ahorizontal plane toward and from the work on the pivotal connection 6with the overhanging support. He can also swing the grinder sidewise orin a horizontal plane'on the swivel connection or sleeve 10. Inaddition, he can also swing the grinder on the ivotal connection 12upward or downwar or in a vertical plane, and also adjust or rotate thegrinder by means of the swivel connection or sleeve 26 on its supportingarm 22, so that in the present improvement there is provided auniversally adjustable grinder, and not only this, but such a grinderthat the weight thereof is wholly or partially counterf balanced by themotor, so that this universal adjustment of it is easily obtained.

In those cases where it is undesirable to make the platform supportingthe motor of such length that the motor may be used to entirelycounterbalance the grinding wheel, a weight may be used in addition tothe weight of the motor for accomplishing this purpose. In Fig. 1 thedotted lines illustrate how a weight 41 may be connected by connectinmeans, such as a rope 40 running over a pu ley 42, with the grindersupporting arm, thereby to maintain the weight of the counterbalancingmeans when it is desired to have the motor close to the dependingsupporting spindle..r Of course the weight may be supported in any othermanner 1f preferred. In practice the motor may be adjusted upon itssupporting platform 17, thereby to adjust the tension of the belt. Itwill also be observed that the joints between the several connectingmembers are so designed that they are dust proof. Furthermore, theshield over the grlnding wheel may be made adjustable to permit the useof various` diameters of Wheels.

In practice should it be desired to -do internal grinding, the handle34, together with the caps thereto attached, may be reversed to bringthe handle into position to project toward the motor and thus notinterfere with Athe grinding wheel when, as stated, it is de sired to dolnternal grinding.

I claim as my invention:

1. In a machine of the class specified, the combination of swingingsupporting means, a-yoke rotatably attached thereto, each end thereofbeing formed into one member of a bearing, a grinding wheel providedwith a shaft supported by said bearings, and

a handle for swinging said rinding Wheel having a pair of ends, saidencgisbeing formed into caps for the said bearings.

2'. In a machine of the class specified, the combination of a yokepivotally secured to an overhanging support, a spindleand sleeve onerotatable relatively to the other and secured to-said yoke, a yokeconnected to said sleeve, a motor support pivotallybonnected to saidlast mentloned yoke and provided with la motor platform below thepivotal connection of said su ort with the yoke, a motor carried by saisupport rearwardly of said yoke, a supporting arm carried by said motorsupport in front of said yoke, a yoke rotatably secured to saidsupporting arm, a grinding wheel supported by said last mentioned yoke,and driving means connecting the motor with the grindin wheel, the axisof the motor, the pivot o the support and the grinding wheel lyingnormally in substantially the same plane.

3. In a machine of the class speciied, the combination of dependingsupporting means, horizontal supporting means pivotally connected tosaid depending supporting means,

a motor carried by said horizontal supporting meansl at one Side of thedepending supporting means, a grinder carried by said horizonta'lsupporting meansy atY the other side thereof, and means for adjustingthe'posi tions of the grinder and motor relative to the dependingsupporting means to the end that one may counterbalance the other.

, 4. In a machine of the class specified, the combination of a dependingsupport, a horizontal support pivotally connected thereto, a grindermounted onthe depending support and a motor also mounted on thehorizontal support with a part of the motor below the axis of the motorand located in position for bringing the axis thereofon a plane withthat of the grinder and support.

5. In a machine of the class specified, the combination of a dependingSupport, a member pivotally connected thereto and embodying a horizontalsupport, a grinder supported by said member, and a motor also supportedthereby with a part mounted on the horizontal supportof the motor' belowthe axis of the pivot, t-he motor being l0- cated at one end side of thedepending supportand the grinder at the other side there- 10 of andrelatively remotely apart to the end that one will counterbalance theother.

MARSHALL F. APGAR. lVitnesses CHAS. B. ANDREWS, W. M. WILLIAMS.

